The specific features of jump-like pulse processes of spontaneous polarization switching in relaxor ferroelectric crystals of strontium barium niobate are investigated. Based on the fixed parameters of the jump-like switching pulses, three possible mechanisms of their formation are revealed.
The influence of an external electrical field and annealing on the polarization state in the surface layers of strontium-barium niobate (SBN) single crystals is studied. The investigation was carried out by pyroelectric method and method of thermal Barkhausen effect (TBE). Essential difference was found to exist in the switching behaviour of pure SBN crystals and SBN doped with Cr, Ce and Cr/Ce impurities.
The thermally stimulated transformation of the domain structure of barium strontium niobate crystals with chromium and cerium photorefractive impurities is investigated using the Barkhausen thermal effect for the first time.
